1 files changed, 31 insertions, 0 deletions
diff --git a/xpcom/base/TupleCycleCollection.h b/xpcom/base/TupleCycleCollection.h
new file mode 100644
index 0000000000..215855fdd8
--- /dev/null
+++ b/xpcom/base/TupleCycleCollection.h
@@ -0,0 +1,31 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef TupleCycleCollection_h
+#define TupleCycleCollection_h
+
+#include "mozilla/Tuple.h"
+#include "nsCycleCollectionNoteChild.h"
+
+class nsCycleCollectionTraversalCallback;
+
+template <typename... Elements>
+inline void ImplCycleCollectionUnlink(mozilla::Tuple<Elements...>& aField) {
+  ForEach(aField, [](auto& aElem) { ImplCycleCollectionUnlink(aElem); });
+}
+
+template <typename... Elements>
+inline void ImplCycleCollectionTraverse(
+    nsCycleCollectionTraversalCallback& aCallback,
+    mozilla::Tuple<Elements...>& aField, const char* aName,
+    uint32_t aFlags = 0) {
+  aFlags |= CycleCollectionEdgeNameArrayFlag;
+  ForEach(aField, [&](auto& aElem) {
+    ImplCycleCollectionTraverse(aCallback, aElem, aName, aFlags);
+  });
+}
+
+#endif  // TupleCycleCollection_h